Pink Granite
Phaneritic Felsic Igneous Rock (Rich in K-Feldspar)
igneous
Category
Sedimentary (Secondary Classification For A Weathered Mineral Specimen)
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Red Jasper (Opaque Chalcedony)
Jasper / Silicon Dioxide (SiO2) with Ferric Iron inclusions
mineral
Quartz Crystal on Matrix
Silicon Dioxide (SiO2)
mineral
Granite or Granodiorite (Weathered)
Granite
Igneous
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2) with Limonite/Goethite
mineral
Chalcedony Geode Fragment
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Ironstone Concretion
Ironstone (Siderite/Limonite/Goethite)
sedimentary
Granite Pebble
Granite (phaneritic igneous rock)
igneous
Concretion
Septarian Concretion (Clay-Ironstone Nodules)
sedimentary
River Rock (likely Basalt or Greywacke)
Basalt or Lithic Sandstone
Igneous or Sedimentary (water-worn)
Granite
Felsic intrusive igneous rock (Granite)
igneous
Purple Dyed Agate Geode (Banded Chalcedony)
Silicon Dioxide (SiO2) - variety: Agate
mineral
Stony Meteorite (Chondrite)
Ordinary Chondrite (L or H type)
meteorite
Sandstone (Iron-stained)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Basalt (Vesicular or Weathered)
Aphanitic Mafic Igneous Rock (Basalt)
igneous
River Rock (Quartzite Pebble)
Quartzite (primarily SiO2)
metamorphic
Riverstone Quartzite (Iron-stained)
Quartzite (primarily SiO2 with Limonite/Goethite staining)
metamorphic
Quartz (Milky or Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Yellow Chalcedony (Agate/Carnelian)
Silicon Dioxide (SiO2)
mineral
Gold Grain
Native Gold (Au)
mineral
Sandstone with Ironstone Concretion
Arenite with Ferruginous Cement
sedimentary
Granite Pebble
Granite (High-silica plutonic rock)
igneous
Aragonite Star Cluster
Aragonite (CaCO3)
mineral
Hematite or Goethite-rich Ironstone
Ironstone (Oxidized Iron Ore)
sedimentary
Quartzite (Iron-stained)
Quartzite (mostly SiO2 with Fe2O3 impurities)
metamorphic
Yellow Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Banded Agate (specifically Carnelian Agate color)
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Basalt Porphyry
Porphyritic Basalt
igneous
Hematite
Iron(III) oxide (Fe2O3)
mineral
Pink Granite Cobble
Phaneritic Felsic Plutonic Rock (Granite)
igneous
Turquoise (beads)
Turquoise; CuAl6(PO4)4(OH)8·4H2O
Mineral
Carnelian (Orange Chalcedony)
Silicon Dioxide (SiO2)
mineral
Botryoidal Chalcedony
Chalcedony (SiO2)
Mineral
Ironstone Concretion (Limonite/Goethite)
Iron-rich sedimentary rock (FeOx)
sedimentary
Wood Stone (Dragon Stone variant)
Argillaceous Sedimentary Rock
sedimentary
Prehnite
Ca2Al(AlSi3O10)(OH)2 (Calcium Aluminum Silicate hydroxide)
mineral
Prehnite
Prehnite, Ca2Al(AlSi3O10)(OH)2
mineral
Chert with Calcite Veins
Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) intrusions
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)
sedimentary
Sandstone Concretion
Clastic Sedimentary Rock (primarily SiO2 with mineral cement)
sedimentary
Ferruginous Sandstone
Clastic Sedimentary Rock (Iron-rich)
sedimentary